In hardened concrete, microsilica powder particles improve the filling of solid materials by occupying the gaps between cement particles, just as cement occupies the gaps between particles of fine aggregate, which in turn occupy the gaps between particles of coarse aggregate. Raw ash microsilica powder accelerates the hydration reaction of cement by providing nodule points in the early stage, in which the cement hydration products are more easily resolved from the solution to form nodule points. Enhanced bonding will benefit the hardened concrete structure by reducing segregation and gaps in the reinforcement and coarse aggregates. The higher the content of microsilica, the more obvious the effect. Microsilica in fresh concrete can significantly reduce permeability and enhance cohesion, which is a physical effect, is the result of mixing very fine particles into the mixture.
Raw ash microsilica can improve the performance of concrete through physical and chemical mechanisms, physical mechanisms include reducing seepage, providing nucleation point formation, and more effective filling of solid particles, etc., with increased concrete compressive and flexural strength, water penetration resistance, filling effect and good adaptability of water reducing agents. Its stack density is low, about more than 200 kg per cubic meter, so it is larger than the same weight of encrypted microsilica, and the transportation cost is on the high side. Raw ash microsilica has the characteristics of large specific surface area, high activity and small fineness.
The characteristics of the original ash microsilica The color of raw ash microsilica powder is lighter than that of encrypted microsilica powder, which will not deepen the color of the admixture and can reduce the observation difficulty of concrete. The original ash microsilica is actually the initial state of microsilica after it is produced and captured, it is obtained by cooling and collecting the gas dust generated during the high temperature production of silicon metal or ferrosilicon alloy, compared to the encrypted microsilica, the original ash microsilica has small particles, easy to disperse, and basically does not need to increase the mixing time of concrete after blending. Microsilica can be used in many cement and concrete projects, even in some refractory materials and rubber materials are also useful, its different color and shape characteristics are divided into original gray microsilica, white microsilica, encrypted microsilica, etc., then what is the original gray microsilica? What is the original ash microsilica
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